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Title: Algebra Substitution Method How do I solve the following? Post by: TomK on Aug 29, 2012 -14x - 4y + 20 = 0
5x -y +5 = 0 What is the answer in (x,y) form and what are the steps to get to that answer? Title: Algebra Substitution Method How do I solve the following? Post by: datheman on Aug 29, 2012 Content hidden
Title: Algebra Substitution Method How do I solve the following? Post by: rk90 on Aug 29, 2012 5x -y +5 = 0
For the above, y seems the easiest... 5x -y +5 = 0 5x + 5 = y Since y = 5x + 5, you can "substute" 5x + 5 in place of y into the other equation. -14x - 4y + 20 = 0 -14x - 4 * (5x + 5) + 20 = 0 -14x - 20x - 20 + 20 = 0 -34x = 0 x = 0 Now substute 0 for x into one of the original equations. 5x -y +5 = 0 -y + 5 = 0 y = 5 x = 0 and y = 5 so... (0,5) |